Archive for category: Arduino

A simple beacon keyer for the ATtiny13

February 18, 2012 | Arduino | By: Mark VandeWettering

Roger, G3XBM built a simple beacon for light communication using a K1EL beacon keyer chip and a handful of other components. I didn’t have any of those chips around, but I did have some Atmel ATtiny13s lying around. I hacked this simple program together to send Morse code in two different ways: on pin PB1 […]

More on ATtiny programming…

February 15, 2012 | Arduino, electronics | By: Mark VandeWettering

Last night’s hacking adventure was inspired by a couple of recent posts from Roger, G3XBM having to do with light based communication. The first was his simple beacon design: it’s just a keyer chip, a MOSFET, a voltage regulator, and some (beefy) current limiting resistors. Roger used this beacon to do some non-line-of-sight communications via […]

Web-based control of an RGB LED via the Nanode, an Arduino compatible microcontroller

February 12, 2012 | Arduino, electronics | By: Mark VandeWettering

Okay, I finally got some time to record a video about a simple little webserver project I hacked together earlier this week. My wife Carmen got me a Nanode kit from Wicked Device around Christmas. These are Arduino compatible development boards which include a Microchip ENC28J60 Ethernet device to enable web connectivity. One slight drawback […]

maniacbug is an Arduino wizard…

February 1, 2012 | Arduino | By: Mark VandeWettering

Ken Boak was nice enough to gift me with a pair of Nanodes when he was out visiting last month. Much to my embarrassment, I haven’t had much time to play with them, so tonight I tried to do a bit more research to figure out how I could use them in some more advanced […]

Interesting “feature” re: _delay_ms in avr-libc

January 31, 2012 | Arduino, Atmel AVR, Microcontrollers | By: Mark VandeWettering

A couple of my projects have used the tiniest of the Atmel ATtiny chips: the ATtiny13. I have written one or two programs in assembler for these chips, but I prefer to work with avr-gcc whenever possible. What’s amazing is that you actually can use a sophisticated C compiler to generate code for such a […]

A $.33 MAX232CPE, or a $0.01 2N3904?

January 28, 2012 | Arduino, electronics | By: Mark VandeWettering

In response to my previous post, @xek replied: @brainwagon has anyone suggested the stupid bjt inverting “buffer” trick? 1/28/2012 7:04 pm via TweetCaster for AndroidReplyRetweetFavorite @xek Josh Myer Well, the fact is I had heard of doing that. It’s not really hard to rig something that will convert the RS232 level from the GPS into […]

Tinkering with an old GPS receiver…

January 28, 2012 | Amateur Radio, Arduino | By: Mark VandeWettering

I used to be an electrical engineer like you, then I took an arrow in the knee. (If you don’t get this, google for “arrow in the knee”, and guess what Xbox game I spent the morning and afternoon playing instead of working on something cool.) I’ve had a number of projects that could benefit […]

High Frequency Precision Sine Wave Synthesis for the Arduino by Adrian Freed

January 23, 2012 | Arduino | By: Mark VandeWettering

While researching something completely different, I found Adrian Freed’s very cool page with code to generate high quality sine waves using PWM on the Arduino. This code could serve as an audio frequency signal generator, or as the basis of a computer music project. It also demonstrates some non-trivial Arduino wizardry in dealing with PWM […]

An Arduino powered IBM PS/2 Morse Keyboard

January 21, 2012 | Amateur Radio, Arduino | By: Mark VandeWettering

I’ve been trying to do a bit more Arduino programming and interfacing lately. Nothing too difficult, but just trying to expand my junkbox and my skills so that I can quickly prototype new ideas and expand the kind of projects that I can tackle in the limited time that I seem to have for playing […]

Nice new breadboard and power supply from

January 18, 2012 | Arduino, electronics | By: Mark VandeWettering

This is just a plug for a cute little pair of gadgets that I got the other day.. If you are like me and use solderless breadboards to experiment with stuff on the Arduino, you end up with the Arduino and the breadboard connected by a hodge podge of wires, and if you accidently tug […]

The downside of Arduino…

January 14, 2012 | Arduino, Rants and Raves | By: Mark VandeWettering

First of all, I really like the Arduino. There are lots of reasons: great community, relatively inexpensive, wide hardware availability and variety, and often a good “impedance” match to projects. But there are a few design choices (both hardware and software) that can be a nuisance, especially as you try to push the limits of […]

Hellduino: Sending Hellschreiber from an Arduino

January 11, 2012 | Amateur Radio, Arduino | By: Mark VandeWettering

Update: Welcome Hack-a-day readers! If you are looking for the schematics for this “transmitter” (really just a simple oscillator, send some love to radio guru Steve Weber over at his website. You could really use any oscillator you like, even a canned oscillator (although the square waves would generate lots of harmonics). Yesterday’s project coupled […]

A micro-power Arduino Morse radio beacon

January 10, 2012 | Amateur Radio, Arduino, electronics | By: Mark VandeWettering

My G0UPL QRSS beacon is working pretty well, but is only putting out about 40mw of power, when it probably should be putting out 100mw. I was pondering oscillators in general, and (as I do often) surf for information and inspiration. I found both on Steve “Melt Solder” Weber’s website, in the form of a […]

The “Hello World” of Arduino Programming: Fading RGB LEDs

January 7, 2012 | Arduino | By: Mark VandeWettering

Allright, I was playing Skyrim most of the day, and didn’t really have my brain firing at it’s highest level when I sat down and decided to try to put something together. We’ve all been there, right? I realized that I had some of this cool RGB LED strip that I ordered from Tayda Electronics, […]

My own lightly modified Arduino Basic

January 4, 2012 | Arduino | By: Mark VandeWettering

I’ve received a couple of requests for my own Arduino Basic modifications. They are pretty straightforward and small, but might be of some use, and I probably won’t have a chance to do any significant work for a couple of more weeks, so I thought I’d just toss them out there for consumption. This is […]